Irradiance of the area for each device frequency or wavelength. The phrases spectral flux density or even more confusingly "spectral depth" will also be used. Non-SI models of spectral irradiance involve Jansky = 10 W⋅m⋅Hz and photo voltaic flux device (1SFU = ten W⋅m⋅Hz). The findings drop light on https://robertt752oyg1.wikicommunication.com/user